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vladimir1956 [14]
3 years ago
13

There are many units of pressure. The standard one is Pa. Express Pa using only the fundamental units of meters, kilograms and s

econds. Explain.
Physics
1 answer:
ipn [44]3 years ago
7 0

Answer:

Pa = kg/m.s²

Explanation:

Pascal (Pa) is the S.I unit of pressure. The formula of pressure is given as follows:

Pressure = Force/Area

The S.I Unit for force is Newton (N) and for Area is (m²). Therefore, the S.I Unit of Pressure will be:

Pressure = N/m²

Therefore, it will be equal to Pascal (Pa)

Pa = N/m²

but, the formula for force is given by Newton's 2nd Law:

Force = (mass)(acceleration)

using S.I Units:

N = (kg)(m/s²)

Therefore,

Pa = [(kg.m/s²)/m²]

<u>Pa = kg/m.s²</u>

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Answer:

The correct option is;

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3 years ago
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A discus thrower turns with angular acceleration of 50 rad/s2, moving the discus in a circle of radius 0.80m. Find the radial an
anyanavicka [17]

Answer:

The value of tangential acceleration \alpha_{t} =  40 \frac{m}{s^{2} }

The value of radial acceleration \alpha_{r} = 80 \frac{m}{s^{2} }

Explanation:

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Radius of the disk = 0.8 m

Angular velocity = 10 \frac{rad}{s}

We know that tangential acceleration is given by the formula \alpha_{t} = r \alpha

Where r =  radius of the disk

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⇒ \alpha_{t} = 0.8 × 50

⇒ \alpha_{t} = 40 \frac{m}{s^{2} }

This is the value of tangential acceleration.

Radial acceleration is given by

\alpha_{r} = \frac{V^{2} }{r}

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⇒ V = 0.8 × 10

⇒ V = 8 \frac{m}{s}

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\alpha_{r} = 80 \frac{m}{s^{2} }

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3 years ago
The weight (W) of an object is the product of its mass (m) in kilograms and g, the acceleration due to gravity in meters/second2
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The weights in newtowns for the given masses are

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What determines how much induced current will flow through a conductor?
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Answer:

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